Drag-line scraper apparatus



Feb, 3, 1925.

H. A. ROE

DRAG LINE SCRAPER APPARATUS Filed Ag1g. 4. 1924 Fatented Feb. 3, 1925w UNITED STATES PATENT OFFICE.

HARRY A. ROE, OF CHICAGO, ILLI1 \IOIS, ASSIG-NOR TO JOHN A. SAUERMAN, OF CHICAGO, ILLINOIS.

DRAG-LINE SCRAPER APPARATUS.

Application filed August 4, 1924. Serial No. 729,938.

To all whom it may concern:

Be it known that I, HARRY A. Ron, a citizen of the United States, residing at 11315 Prairie Avenue, Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in DragLine Scraper Apparatus, of which the following is a specification. I

My invention relates, more particularly to the connections between the scraper of the drag-line scraper apparatus and the lines through the medium of which the scraper is operated; and my primary object is to provide improvements in such connections whereby the scraper may be positioned, as desired, for digging-into-the side of a pile of material to be transferred, and travel of the scraper through a predetermined path, insured.

Referring to the accompanying drawing: 7 I

Figure 1 is a plan view of a portion of a drag-line scraper apparatus installation embodying my invention and showing the scraper and a portion only of the other parts of the installation; and Figure 2, a view in side elevation of the scraper of Fig. .1.

\Vhile my invention is applicable to scraper installations involving scrapers either of the scoop or bottomless type, I have illustrated it in connection with a bottomless scraper shown as of the same general construction as the scraper disclosed in United States Letters Patent No. 1,481; 273, granted to me January 22, 192 1, the scraper, which is of general crescent plan being represented at 3. The forward ends of the side portions of the scraper-at the open end thereof,-and represented at 4, are, in the construction shown, substantially flat and vertically disposed to present cutting edges, The general form of the scraper is curved in vertical sectional elevation, as shown in said patent, the upwardly and inwardly extending portions of each side wall being progressively more divergent from the extremerear end of the scraper to point adjacent the cutting edges 4. and finally merging into the substantially flat vertically disposed cutting edge terminals 4 of the scraper.

The load cable represented at 5, which would, in'practice, be operated by any suit,-

scraper to become loaded.

able power and through the medium of which the scraper is drawn in a direction to theforward end portions 4 of the scraper.

In accordance with my invention means are provided, whereby, as desired, one of the elements of the front bridle may be caused to be in slack condition during the pulling of the scraper against the material to be transferred, to the end that the scraper, instead of being lined with the direction of pull on the pull cable 5, will be out of line therewith, or in other words will be in skewed position, and when the scraper is moved against the side of a pile of material to be transferred, its cutting edge 4, adjacent the pile, is caused to dig laterally into the material to cause the In the particular construction shown the-means referred to are connected with the back-pull cable 12 which would, in practice, be operated by any suit able means andwhich is connected with a rear bridle, shown as formed of chains 13 connected at their rear ends with a clevis 14 on the pull cable 12, and at their forward ends with clevises 15 pivotally supported at 16, onclips 17 mounted on the scraper at opposite sides of its longitudinal center line, being shown as secured to the under side of the scraper at the rear end thereof The skewing means comprise the cable 18 connected at its rear ends with the clevis ll and at its forward end, at a ring 19 thereon,

with one of the clevises 11, the'cable 18.

between its ends, extending over a pulley 20 carried by a yoke 21 engaging the rear end of the pull cable 5, the cable 18, between its point of connection with the clevis 11. as stated, and the point at which it extends over the pulley 20, being provided with a stop-block 22.

It will be readily understood from the foregoing that when it is desired to cause the scraper to become skewed out of line lit) with the direction of the pull on the cable 5, as for example to the position shown in Fig. 1, the operator exerts drag upon the back pull cable 12, as for example by par tially braking the drum upon which the cable 12 is moved where such a device is used, while the pull cable 5 is being drawn upon, thus producing a turning movement of the scraper with the result of causing the section 7 of the bridle, to become slack, to an extent depending upon the amount of pull exerted on the line 12 by the operator, the stop 22, which is preferably adjustable along the cable 18, operating to limit the degree of turning movement of the scraper.

The various parts illustrated are so proportioned and arranged, as shown, that during the actuation of the scraper by drawing on the pull cable '5, the bridle 13 will be in slack condition, thereby avoiding the tendency of the tipping of the scraper upwardly and forwardly, as would be the case if the bridle 13 were taut, during the forward movement of the scraper, where the over haul-line 12 extends downwardly from its poi'nt'of support, to the bridle 13;

the arrangement further bein'gsuch that the bridle at the front end of the scraper is caused to be in slack condition, during the drawing of the scraper backwardly by pulling on the over haul-line 12, in which condition the bridle 13 is taut, thereby avoiding the tendency to upward and rearward tilting of the scraper such as exists where the haul-line 5 extends downwardly from its point of support to the front bridle, and the latter is in taut condition.

\Vhile I have illustrated and described a particular construction embodying my invention, I do not wish to be understood as intending to limit it thereto, as the same may be variously modified and altered without departing from the spiritof my inven tion.

hat I claim as new, anddesire to secure by Letters Patent, is:

1. In drag line scraper apparatus, the combinination of a scraper, a load-line operatively connected with said scraper, and means operating, when actuated, to cause the scraper when drawn upon by. said loadline to occupy a position out of line with the draft of said load-line and be maintained out of line at the will of the'operator irrespective of the resistance afforded by the material being operated upon, for the purpose set forth.

2. In drag-line scraper apparatus, the combination of "a scraper, a load line operatively connected with said scraper, and means mounted on the scraper and operating, when actuated, to cause the scraper when drawn upon by said load-line to occupy a position out of line with the draft of'said load-line, for the purpose set forth,

said means being adjustable to vary the position of said scraper relative to said line of draft.

3.111 drag line scraper apparatus, the combination of a scraper, a load-line, a bridle at the front end of said scraper to which said load-line is operatively connected, and means operating, when actuated, to cause one side of said bridle to become slaclrened and to be maintained in slackened condition at the will of the operator, irrespective of the resistance afforded, by the material being operated upon, for the purpose set forth.

4. In drag-line scraper apparatus, the combination of a scraper, a load-line, a bridle at the front end of said scraper to which said load-line is op'eratively connected, a cable connected at one end with said scraper at one side of the line of draft of said load-line, and a 'member operatively connected with said load-line and over which said cable extends, for the purpose set forth.

5. In a'drag-line scraper apparatus, the combination of a scraper, a load-line, a bridle at the front end of said scraper to which said load-line is operatively connected, a cable connected at one end with said scraper at one side of the line of draft of said load-line, and amember operatively connected with said load-line and over which said cable extends, for the purpose set forth, the other end of said cable ex tending rearwardly.

6. In drag-line scraper apparatus, the combination of a scraper, a load-line, a bridle at the front end of said scraper to which said load-line is operatively connec ted, a cable connected at one end with said scraper at one side of the line of draft of said load-line, and a member operatively connected with said load-line adjacent the connection betwen said bridle and load-line and over which said cable extends, for the purpose set forth.

7 In drag-line scraper apparatus, the combination of a scraper, a load-line, a bridle at the front end of said scraper to which said load-line is operatively connected, a cable connected at one end with said scraper at one side of the line of draft of said load-line, and a member operatively connected with said load-line adjacent the connection betwen said bridle and load-line and over which said cable extends, for the purpose set forth, the'other end'of said cable extending rearwardly.

8. In drag-line scraper apparatus, the combination of a scraper, a load-line, a bridle at the front end of said scraper to which said load-line is operatively connected, an overhaul line ope 'atively connected with the rear portion of said scraper, with its front end connected with said scraper at one side of the line of draft of said loadiine, and a member operatively connected with said load-line and over which said overhaul-line extends, for the purpose set forth.

9. In a drag line scraper apparatus, the combination of a scraper, a load-line operatively connected with said scraper, and means operating, when actuated, to cause the scraper when drawn upon by said loadline to occupy a position out of line With the draft of said load-line and be maintained out of line at the will of the operator irrespective of the resistance afforded by the material being operated upon, for the purpose set forth, said means being adjustable to vary the position of said scraper relative to said line of draft.

10. In drag-line scraper apparatus, the combination of a scraper, a load-line operatively connected with said scraper, and means mounted on the scraper and operating, when actuated, to cause the scraper when drawn upon by said load-line to occupy a position out of line with the draft of said line.

HARRY A. ROE. 

